Prowler is an open-source cloud security platform that checks cloud environments for security issues and compliance with standards such as CIS, NIST, and GDPR. Security teams use it to assess configurations, prioritize findings, produce reports, and guide remediation.
Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add prowler-cloud/prowler --skill prowler-test-mcpgit clone --depth 1 https://github.com/prowler-cloud/prowlerWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/prowler-cloud/prowler/prowler-test-mcp)<a href="https://agentmods.dev/skills/prowler-cloud/prowler/prowler-test-mcp"><img src="https://agentmods.dev/badge/skills/prowler-cloud/prowler/prowler-test-mcp/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/prowler-cloud/prowler/prowler-test-mcp"><img src="https://agentmods.dev/badge/skills/prowler-cloud/prowler/prowler-test-mcp.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00067 | $0.01828 |
| Opus 5 | $0.00034 | $0.00914 |
| Sonnet 5 | $0.00013 | $0.00366 |
| Haiku 4.5 | $0.00007 | $0.00183 |
Grade A, and why
prowler-test-mcp scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 168 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Critical Rules
- ALWAYS drive tools through an in-memory client:
async with Client(mcp_root_server). Tool parameters use pydanticField(default=...), and only FastMCP's wrapper resolves those defaults. Calling a tool method directly with an argument omitted leaves it as a rawFieldInfo— which is truthy, soif email:silently builds a filter out of theFieldInforepr. Direct calls MUST pass every argument. - NEVER open a
fastmcp.Clientinside a fixture. FastMCP warns this causes hard-to-diagnose event-loop issues; open it inline in the test. - ALWAYS use the
mock_api_clientfixture; NEVER construct aProwlerAPIClient. Tool instances captured the singleton by reference at import time, so only an in-place patch of.clientreaches them. - NEVER clear
SingletonMeta._instances. It orphans every registered tool on an instance holding a realhttpx.AsyncClient. Useisolated_api_clientif you genuinely need a fresh instance. - NEVER strip
PROWLER_API_KEY. Tools are built at import time and a construction failure is swallowed, so the wholeprowler_*namespace silently drops to zero tools. It is pinned in[tool.pytest_env]. - For
ProwlerAppAuth, passmode=/base_url=explicitly. Those are resolved in default arguments, evaluated once at module import, somonkeypatch.setenvhas no effect on them. - NEVER assert an exact tool count — every future branch would have to bump it.
- Assert on
result.data(structured output), notresult.content[0].text. - Tests are
test_*.py(prefix), like the API — not the SDK's*_test.pysuffix. __init__.pyIS required in everytests/subdirectory here (unlike the SDK's repo-roottests/), or same-named modules collide under pytest's import mode.- Async tests need no marker (
asyncio_mode = "auto"). Do not use@pytest.mark.anyio. - Use only obviously-fake credentials from
tests.helpers.tokens(TruffleHog). - One behaviour per test; keep tests self-contained and order-independent.
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 168 lines · 67 tokens per session scan A 6ad330962da2
prowler-test-mcp is a skill published in the GitHub repository prowler-cloud/prowler (14,773 stars, last pushed today), licensed Apache-2.0. It adds 67 tokens to every session and 1,828 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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